KIPP middle schoolers learn significantly more than comparison students, concludes a report by Mathematica Policy Research on 43 schools in 13 states plus the District of Columbia. Three years after enrollment, the average KIPP student gained an extra 11 months in math, moving from the 44th to the 58th percentile, and eight months in reading, moving from the 46th to the 55th percentile. Science gains equalled an extra 14 months and social studies an extra 11 months.
In 13 schools, students in the control group had applied to KIPP, but lost the charter lottery. If there was no lottery, the study used “matched” students of similar achievement and demographics in nearby schools.
For KIPP students in the lottery sample, researchers administered the TerraNova test—a nationally norm-referenced test—which students had not prepared for, and which carried no consequences for students or schools. The impacts shown in the TerraNova test were consistent with those shown in state tests.
KIPP students resembles other students in their neighborhoods, but with lower reading and math achievement than their elementary school classmates, the study found. Ninety-six percent are black or Hispanic and 83 percent are eligible for free or reduced-price school meals. However, KIPP entrants are less likely to have received special education services or to have limited English proficiency. (Since many more KIPP students are black, it makes sense that fewer speak English as a second language.)
Critics charge KIPP “counsels out” low achievers to inflate scores, notes Education Week. To account for attrition, the study included all students who started KIPP, even if they left for another school.
For example, a student could leave KIPP for another school in 6th grade, but their performance at the new school is counted towards the academic achievement of KIPP students overall regardless. The report also found that KIPP schools have similar attrition rates as traditional district schools (37 percent over three years for both sets of students).
KIPP students spend much more time in school than traditional public school students: nine hours per day, for 192 days each year, in KIPP, compared to 6.6 hours per day, for 180 days. In addition, KIPP students spend an extra 35 to 53 minutes on homework each night.
However, a longer school day didn’t raise test scores, possibly because the extra time was spent on non-academic activities, researchers found. KIPP schools that spent more time on core academic subjects and enforced a comprehensive discipline policy had the strongest results.
In schools where school-wide behavior standards and discipline policies are consistently communicated and enforced, the school rewards students for positive behavior, and the school punishes students who violate the rules, reading and math scores went up, researchers found.
While KIPP students are more satisfied with their school, the study did not find an increase in “attitudes associated with success,” such as persistence and self-control. Students were more likely to admit to losing their temper, arguing with or lying to their parents, or giving their teachers a hard time. Researchers weren’t sure if they were more ornery or more honest about it. Students may have raised their standards about acceptable behavior, said Mathematica researcher Brian Gill.
In comparing higher-performing to lower-performing KIPP schools, researchers found “class size, teacher experience and professional development opportunities” were not associated with higher scores, adds Jay Mathews in the Washington Post.
The latest CREDO study of charter school effectiveness found New York City charter students gain an extra five months in math — seven months in Harlem — and one month in reading, compared to similar students in traditional public schools. Charters enroll many more blacks. One in three Harlem kindergartners attends a charter school.